Monolayer, composite, gas separation material, filter, gas separation device and method for manufacturing composite

Patent metadata

Field	Value
Publication number	US-10981122-B2
Application number	US-201716079600-A
Country	US
Kind code	B2
Filing date	Feb 24, 2017
Priority date	Feb 25, 2016
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

A monolayer membrane containing gelling polymer particles having at least one of a basic functional group and an acidic functional group, and having a thickness of less than 5 μm. A composite having a porous carrier and gelling polymer particles having at least any one of a basic functional group and an acidic functional group and filling up the surface pores of the porous carrier. The invention can provide a novel material capable of efficiently separating an acid gas from a mixed gas.

First claim

The invention claimed is:

1. A composite having a porous carrier and a monolayer membrane containing gelling polymer particles having at least one of a basic functional group and an acidic functional group, wherein:
the gelling polymer particles fill up the surface pores of the porous carrier,
the monolayer membrane has a thickness of less than 5 μm, and
the surface pores of the porous carrier have an open pore diameter of less than 0.5 μm.

2. The monolayer membrane composite according to claim 1 , wherein the gelling polymer particles is constituted by a polymer of a monomer component containing a monomer having an amino group and a monomer having a hydrophobic group, and the molar ratio of the amino group-having monomer to the hydrophobic group-having monomer is 1/95 to 95/5.

3. The composite according to claim 1 , wherein the amino group-having monomer is an N-(aminoalkyl)methacrylamide and the hydrophobic group-having monomer is an N-alkylacrylamide.

4. The composite according to claim 1 , wherein the gelling polymer particles are particles of a polymer compound infiltrated with a basic molecule.

5. The composite according to claim 1 , containing gelling polymer particles having an acidic functional group and gelling polymer particles having a basic functional group.

6. The composite according to claim 1 , wherein among the gelling polymer particles, a crosslinked structure is formed between at least a part of the gelling polymer particles.

7. The composite according to claim 1 , wherein the monolayer membrane contains a membrane stabilizer containing a polyvinylamine or a polyvinylamine derivative.

8. The composite according to claim 1 , containing a titanium crosslinking agent.

9. The composite according to claim 1 , wherein the pore diameter of the surface pores gradually reduces toward the inside of the porous carrier.

10. The composite according to claim 9 , wherein the porous carrier has an OH group or a COOH group in the surface thereof or the surface of the porous carrier is hydrophilized.

11. The composite according to claim 9 , wherein the mean square roughness of the composite surface is 5 μm or less.

12. A gas separation material having the composite of claim 9 .

13. The gas separation material according to claim 12 , wherein the carbon dioxide permeance at 40° C. is 10 GPU or more and the nitrogen permeance at 40° C. is 100 GPU or less.

14. The gas separation material according to claim 12 , wherein a plurality of the composites are connected in series.

Assignees

• Univ Kyushu Nat Univ Corp

Inventors

• Hoshino Yu
• Imamura Kazushi
• GYOBU Tomohiro
• Taniguchi Ikuo
• Hamasaki Akira
• Yamashita Chie
• Watanabe Takeshi
• Miura Yoshiko

Classifications

• B01D71/06 Primary

  Organic material · CPC title

• B01D71/4011

  Polymethylmethacrylate · CPC title

• B01D71/262

  Polypropylene · CPC title

• B01D69/1213

  Laminated layers · CPC title

• B01D71/261

  Polyethylene · CPC title